The utility model relates to the field of forestry machines and equipment, in particular to a tree transplanting device. The tree transplanting device comprises a machine head frame which is hinged to a construction arm of a construction device and is driven by a driving device. The machine head frame is provided with a U-shaped shovel blade and a shovel blade driving mechanism. The two free ends of the U-shaped shovel blade are hinged to the machine head frame. Each shovel blade driving mechanism comprises a shovel blade driving cylinder and a shovel blade linkage plate, wherein a cylinder block of the shovel blade driving cylinder is hinged to the machine head frame, the end A of the shovel blade linkage plate is hinged to an output shaft of the shovel blade driving cylinder, the end B of the shovel blade linkage plate is hinged to the machine head frame and is fixedly connected with the corresponding free end of the U-shaped shovel blade, and the shovel blade linkage plate and the U-shaped shovel blade rotate coaxially along the end B of the shovel blade linkage plate. By the adoption of the tree transplanting device, the tree transplanting process is simplified, construction is convenient and rapid, a cut soil ball is regular, and the survival rate of trees is high.